Dear Valued Patients:

We are pleased to announce that we now offer telemedicine visits at our practice. Our providers will offer the same excellent care to you in the comfort of your own home.

To determine if a face-to-face visit or telemedicine visit is appropriate for you, please call our office at: 610-983-3980, so that we can assist you with your options.


Regarding the Coronavirus:

Patients who have appointments should know that all operations continue as usual. Our practice remains at the ready to provide quality care to all our patients.

As confirmed cases of Coronavirus are appearing closer to our area, we want to share with you how we are taking steps to provide the safest environment for our patients and staff.

We are closely following the CDC (Center for disease Control) recommendations.

We request that you also join our effort to keep a safe environment for everyone.

  • Clean your hands regularly. Wash your hands with soap and water for at least 20 seconds, particularly after you have been in a public place, have blown your nose, coughed, or sneezed.
  • Avoid touching your eyes, nose, and mouth with unwashed hands.
  • Cover your mouth and nose with a tissue or use the inside of your elbow when you cough or sneeze.

Our office cleans and disinfects throughout the day, including all surface areas that are touched.

We ask that patients do not come to the office if you have any of the following:

  • You feel sick, have a fever, or have been consistently coughing.
  • You have traveled outside of the US in the last 14 days.
  • You have been in close contact with anyone who has traveled to any area that has experienced the Coronavirus (COVID-19) outbreak.

We appreciate your assistance in helping us to provide a safe environment for our patients and staff.

Thank you,
Dermatology Associates


Our Services

  • Preventive Dermatological Health Care
  • Cosmetic Consultations and Procedures

Appointment Request

Please have your insurance information available when scheduling your appointment!

Health Insurance

We accept most public and private insurance plans. Please verify with your insurance company that our providers are credentialed in your network. A list of insurances we do not accept is located on our contact page.

New Patients

Please print and fill-out our new patient paperwork located on our contact page to bring with you to your first visit. You will also need: your own insurance card, photo ID, and a list of your medications. If your insurance requires a referral, it is your responsibility to obtain one prior to your visit.

For Billing Inquiries, feel free to email our Billing Department: [email protected]




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Meet the Providers

  • Peter Motel, M.D.

    Peter Motel, M.D. received his medical degree from Drexel University in Philadelphia.  He completed residency training in Internal Medicine at Einstein Medical Center and in Dermatology at Jefferson University.  He is board certified in both Internal Medicine and Dermatology, and he is a Fellow of the American Academy of Dermatology.  He served four years as a physician in the United States Air Force after which he started Dermatology Associates of Phoenixville and Valley Forge.  

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  • Sharon Zellis, D.O.

    Sharon Zellis, D.O. FAAD Dr. Zellis is a board certified dermatologist and Fellow of the American Academy of Dermatology. She is a graduate of Emory University and the Philadelphia College of Osteopathic Medicine.

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  • Brett Miller, M.D.

    Dr. Brett B. Miller is a board-certified Dermatologist and a fellowship-trained Mohs surgeon.  A Pennsylvania native, Dr. Miller is a graduate of Penn State University and Drexel University College of Medicine in Philadelphia. Following graduation, he completed his internship training at Crozer Chester Medical Center and his Dermatology residency at Drexel University College of Medicine, where he served as Chief Resident.

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  • Cara Cohen, PA-C, MPAS

    Cara Cohen, PA-C, MPAS, is a Nationally Board Certified Physician Assistant who has been practicing Medical and Cosmetic Dermatology since 2004. She obtained her Bachelors degree from Pennsylvania State University and her Masters degree in Physician Assistant Studies from Philadelphia University.

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  • Lisa Gresko, RN

    Lisa Gresko, BSN, RN started with Dermatology Associates as a medical assistant in 2005. She went on to receive her nursing degree from Reading Hospital School of Health Sciences in 2017, where she graduated magna cum laude. She completed her Bachelor of Science in Nursing at Chamberlain University in 2018. Lisa is a Certified Aesthetic Laser Operator and a member of the National Council on Laser Certification.

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  • "Dr. Zellis and the entire practice have made going to the dermatologist a positive experience. Always prompt and efficient with beginning the appointment, always a thorough and careful exam. Everything is explained and related. With our pending move to the West Coast, this practice will not be able to be replaced. I think we will have to arrange to fly here for appointments!"
  • "I am happy to have this opportunity to write about Cara Cohen. I am very particular about my face and won’t let just anyone touch it. I have been coming to Cara for years. I have sent my husband, son, and daughter to Cara. She is a perfectionist and makes sure you leave feeling 100% confident. People ask me all the time for her telephone number. Thank you, Cara!"
    L. B.
  • "My family has used Dr. Zellis for 15+ years and we can only sing her praises!! She is always professional and focused on the needs of her patients. Being of Irish heritage, we are prone to skin cancer, so quarterly checks are mandatory and her monitoring of our skin has prevented any major issues to date. Her staff is extremely helpful and professional on every encounter. They always have a cheery, upbeat attitude, and are always patient-centered. The business office is very efficient and always easy to work with regarding any insurance issues. Overall, we are extremely pleased with the services and attention provided, and would not consider any other dermatologist!"
  • "Coming SooI’ve been seeing Dr. Motel for years! He is just wonderful – and very, very thorough, which is so important. No one ever told us years ago how bad the sun is – lesson learned! Thank you, Dr. Motel, for preventing what could have been very bad!n!"

Office Hours

*Hours subject to change per doctor availability


8:00 am-7:00 pm


8:00 am-7:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-4:00 pm